Because you certainly didn't sign up to play a game knowingly that has a significant "luck" factor...
Seriously grow the fuck up. Don't like has? don't play pokémon - it's really quite simple. When you play an absurd number of games like in these marathons you will absolutely have some unfortunate games; that doesn't make disconnecting okay.

oh hey. is it possible i could have a few more days time? i still need to build teams/practice heh. also could we possibly play at a later time? 7pm your time is 5:30am my time and i cant really wake up that early lol.